The software randomly generates questions, adding, subtracting and multiplying between 2 digits and 3 digits and 4 digits.
A good tool for elementary school students to practice the speed and accuracy of oral arithmetic.
Cooperate with the calculation time to count, you can also play and practice with parents and children
https://andro.io/app/maths-ws94
Power 100
Android app profile
心算练习 for Android – Latest Version & Features
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> 2.2k
Monthly Downloads
~$900
Estimated Cost
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